Multiple-tool well-drill.



Patente June 2?, 1911.

' 3 SHEETS-SHEET 1,

J. N. LEWIS.

MULTIPLE TOOL WELL DELL. APLIOATION ruan nov. 2, 1909` 5 I v3.4 N. LEWS. MULTIPLE TOOL WELL DRILL.

APPLICATION PILED NOTZ, 1909.

Patenta& June 27, 1911.

3 SHBETS--SHEET 3.

artan: v

am i/bug o JAMES N. LEWIS, OF DnTRoIT; MICI-IIGAN.

V MULTIPLE-TOOL WELL-DRILL.

Specfication of Letters Patent. Patented J u e 27 Application filed November 2, 1909. Serial No. 525322.

To all 'whom 'it may concern:

Be it known thatjI, JAMES N.

citizen of the United States, resicling at Detroit, in the countyof Wayne and Sta-te of Michigan, have invented certain new and useful Improvements in MultipleTool Well- Drills; and I do hereby declare the following to be a. full, clear, and exact description "cially to drills for but showing the Fig '6 is a View in end elevation of the drill of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to drills, and espelike, and has for an object to provide a drill which can be slipped down inside of the casing tube, but which when in operative position will cut'out a hole larger than the tube and large enough for the tube to follow.

A further object of the'inven-tion( is to provide a drill head having socke'ts for receiving the bits so proportioned that the bits a when not in use occupy a different position than When in use, so that the head carrying such bits may be slipped down within the casing tube which is to follow the drilling produced by the hits lVith these and otherobjects in View the invention comprises certain novel Constructions, combinations and arrangements of parts, as will be hereinafter fully described and claimed.

In the drawings:, Figure 1 is a View in section oi" the drill head carrying two drill bits. Fig. 2 is a View in end elevation of the drill head' carrying the bits and showing a position line 1-1 indicating the section of Fig. 1. Fig. 3 'is a View in side clevation of the drill* head and hammer with' the isa View in side elevation similar to Fig. 3 hammer drawn upwardlv.

head with the bits removed. 6 isa View of the hammer in side elevation at right angles to the View in Figs. 3 and 4.

ig. is a View in end elevation of the hammer as shown at Fig. 6. Fig'. 8 is a View in side elevation of an additonalweight to LEWIS, a

drilling wells and "the hammer in contact with the head. Fig. 4

apply to the hammer and for drilling in deep wells where the water pressure reduces the effective force of' the hammer. Fg. 9 is a View in end elevation of the additional weight seen at Fig. 8; Fig. 10 is a modified form of drill spindle and hammer.

Like characters of reference designate corresponding parts throughout the several VleWS. i

The drill which frms the subject-matter of this application is of\ the type enployed fo'r dt'illing ahad^of the casing tube of'a deep ivell and embodies a hollow drill head 15 having rolds 16 ettending longitudinall fai- 1. i

therethrough and beyond the end of the dri l head opposite the bits, The drill head is provided with sockets 17 to receive bits 18 and 19 in aii y desired number shown at Fig. 2 as four of 'the bits 18 and three of the hits-19, although it is to be understood that any approved number of such bits may be employed.

The sockets 17 are formed as shown at Fig. 1, those for receiving the bits '18 having inwardly extending angularly disposed cam faces as ndicated at .20-while those adaptcd to receive the bits 19 are provided with outwardly extending angularly disposed cam faces as indicated at 21. 'If he. bits 18 and 19 are respectivly provided with shanks 22 and 23 having shoulders 24 and 25 adapted to rest uponthe positioning collar 26 so that when idle the bits will'hang in the position show-n in dotted lines in Fig. l and well within the periphery ofthe casin'g tube which is at 27.

hen the bits 18 and 19 engage the rock or other material upon which they are to* operate the weight of the head 15 forces the bits upwardly' within the sockets and along the cam faces 20 and 21 to the position shown in full lines in Fig. 1 sot hat the bit 18 then extends outwardly beyond the outer periphery or the casing tube indicated in dotted lines, while the bit 19 is in position to cut within the circle cut by the bit 18.

' Upon the rods 16 which extend above 'the indicated in dotted lines drill head a hammer 28 is mounted being formed with furrows 29 formed along the sides within which the rods 16 are embraced and with rods 30 rigidly Secured to the hammer and serving as a means. by which the hammer may be lifted and permitted to fall upon the drill head 15.' The rods 16 are connected at their upper heads by a keeper 31 which serves simply to limit the upward movement of the hammer under the impulse of the lifting cable.

In Operating in deep wells the water pressure' neutralizes the weight of the hammer to such an extent that a suiicient force is not secured and it becomes desirable to employ longer rods 16 and 30 and to add to the hammer additional weights 32 `which are provided with lugs 33 adapted to engage the rods 30 of the hammer and the body of the weight being of such diameter as to operate between the rods 16.

Instead of employing the rods 16 and 30 as shown at Figs. 1 to Qinclusivc a drill head 15' may be provided with a tubular extension 34: having a head 35 formed at its upper end and the hammer 28' may be formed as a cylinder having an inturned flange 36 adapted to engag e the head 35 to limit the upward movement and to strile the drill head 15' upon the return `movement. For -attaching the eahles eye holts 37 may be empl'oyed te which 'said cahles are Secured. i

Whatever the form of the de vice the proportions are such that the drill hit-s 18 will extend beyond the periphery ot the drill head to a suficient extent to cut a circle larger than the casin tuhe indieated at 27 but when it is desirahle to 'withdraw or insert such drill to fall to dotted position shown at Fig. 1 to permit its passage through such casing tube.

Whatever its form the deviee is also provided with a central opening indieated at 38 through which the products of drillin may be carried away by water in the usual manner.

What I claim is`:-

1. In a drilling device, a drill head hrovided with longitndinally lendine sockets and cam sui-faces fornied within the sockels similar-ly inclined upon opposite sides ot', and relative to the axis 2. In a drilling devicc, a hollow'drill head having sockets projectcd into the em] of the head and `'with similarly inclined cam surfaces formedwithin the sockets extending substatially parallel upon opposite sides of the head.

3. In'a drlling device, a hollow drill head 'ith sockets `projccted into the end of the head, a cam surface formed within each of .drill hits inserted each wth a shoulder. and `a collar the sockets, the cam surface of certain of the sockets having an inclination opposite to that of adjacent sockets.

4. In a drilling device, a hollow (ll ill head having' sockets formed within the end of the head. drill hits nserted within the soclrets and provided with shoulders, and a removable eollar Secured upon the head adapted to engage the sl'hulders of the hits and prevent displacement'from the sockets.

In a drilling device, a hollow drillhead having a reduced portion at the end formtudinally in the head at the shoulder, drill bts inserted within the soclrets and provided each \"vith a shoulder, and a collarsecured upon the reduced portion and positioned` to engage the shoulders of the hits and prevent their displacement from the sockets.

G. Ina drilling'device, a having a reduced portion at the 'end forming a` shoulder and with sockets projected longitudinally in the head at the shoulder, within the sockets and ;provided tsecnred upon the rednced portion and positionetl to engage .the shoulders of the bits ing a shoulder with sockets projected longihollow drill head und prevent their tilisplaeement from, the

sockets.

7. ln a (ll'llllllg deviee, a hollow drill head having a reduced portion at one end forne ing a shoulder and with sockets into the head al]accnt the shoulder, hits inserted wthn the soekets and provided with shanks *ach having' a laterally extending shouldergsnch shanks being slorter than the soeket. and a collar seem-ed upon the redm'ed portion of the head positoned projected drill to engagje and limit the movement: of the hits.

8. Tn a drilling: deviee, a hollowdrill head, driil hits inserted into the end ot' the head, -ods rigidly set-tired to the head and extending upwardly rocate upon the rods and to impingc upon the head. and other rods sccured to the hammer and adapted for connection with a source of power.

9. Tu a drillingdeviema hollow drill head', and drill hits inserted loosely in the end of the head, rods rigidly secured to the head and extending upwardly, a hammer in the l'orm of a hollow core nour. ed to reripro' a hammer nounted to recipeate upon the rods and to inpiuge upon the e head, and other rods Secured rg dly to the hammer and adapted for connection with the source ot' power.

10. l`n a drlhng devce, head, and d'll hits Inserted loosely n the end of the hotlow head, rods cxtending up a hollow drilt" wardly from the head, a hammer having 996,&95 a guides formed in the side thereof for enpermitting a reciprocation of the hammer gagement with the rods, and other rods rigto impinge upon the head, and means exdly ecured to the hammer and extending tending upwardly from the hammer adaptupwardly in position for connection with ed for connection with the source of power.

5 the source of power. In testimony whereof I afix my signature 15 11. In a drillng device, a hollow drill in presence of two witnesses. i head, drill hits inserted in the end'of the JAMES N. LEWIS. head, a hammer in the form of a hollow Witnesses: core means connectng the hammer with G. WARD KEMP,

' the head forming a' guide for the hammer J. O. NAsLIN. 

